JPH03106517A - Manufacture of parts using press working technology - Google Patents

Abstract

PURPOSE:To reduce manhour and to improve safety in work operation by leaving parts as they are connected with bridges so as to be able to take out the parts outside a die and cutting off the bridge parts in the final stage. CONSTITUTION:When ring-like parts are made, first, an unworked base material 16 is fed on a lower die 5. Next, an inside circular part 62 is blanked using a compound punch and compound dies 43, 55, 56 and circular-arc-shaped blanking grooves 63 which are a concentric circle and intermitted at four places are formed outside the circular part 62. Thus, the ring-like parts are connected with the four bridges to the base material. The forming of the grooves 63 is performed with a punch whose cutting edge on the press face is removed at four places. Next, above a preloading cradle 59, the ring-like parts which are connected with the bridges are pressed with a cut-off punch 45 and a cut-off die 58 and the ring-like parts are cut down from the base material on the preloading cradle 59.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an improvement in a method of manufacturing parts using press working technology.

Conventional technology> Conventionally, as a complete punching press die, there was one shown in Fig. 5, for example. This press mold shows a mold for making ring-shaped parts as shown in Figure 6. In FIG. 5, 1 is an upper movable type, and 2 is a lower fixed type.

In the upper moving type 1, 11 is a punch and 12 is a goo. In the lower fixed die 2, a portion 21 formed with two convex shapes is an outer punch and an inner die. In such a press mold, when the material 3 is placed on the lower fixed mold 2 and the upper movable mold 1 is pressed against the lower fixed mold 2 while being aligned, the material 3 is punched out by the punch and die and the part 31 is formed. cut off from the material.

Problems to be Solved by the Invention In such a manufacturing method, the pressed parts 31 fall onto the material 3, and therefore the operator must remove the parts one by one. For this reason, there were problems in that the number of man-hours required was increased and the work was also dangerous. The present invention has been made to solve these problems, and is a press process that eliminates the need to remove parts separated from the material by press process, reduces the number of work steps, and improves work safety. The purpose is to realize a method for manufacturing parts using technology. Means for Solving the Problems> The present invention provides a method for manufacturing parts using press working technology, which is characterized in that the method includes the following steps: It is.

■A process in which a punch with part of the cutting edge on the press surface removed is used to press the part until it is connected to the material with a bridge without being completely pulled out. ■The process of transporting parts connected by bridges to the parts removal position. ■The process of cutting this bridge using a press and cutting the parts from the material. In the present invention, although the required shape is pressed in one step, the parts are kept connected by bridges so that they can be taken out of the mold, and the parts are fed to the outside of the mold. , the bridge part is cut in the final process. Embodiments> The present invention will be described below with reference to the drawings. Figure 1 is a horizontal view of an example of a press machine used in carrying out the present invention. In the figure, 4 is a movable upper mold, and 5 is a fixed lower mold. In the upper mold 4, 41 is a stripper for removing metal attached to the die;
42 is the upper gusset. The upper die set 42 includes a punch and die 43 for complete punching, and a punch 4 for punching a pilot hole for positioning the material.
4 and a dropping punch 45 for finally separating the component from the material. 46 is a slide that moves the upper die set 42 in the vertical direction, and 47 is a pilot punch that is inserted into the pilot 6 to position the material.

When the upper mold 4 is viewed from direction A, it looks like Figure 2. Returning to FIG. 1, in the lower mold 5, 51 is a bolster that is the base of the lower mold, 52 is a sub-bolster fixed on the bolster 51, and 53 is a lower die fixed on the sub-bolster 52. It is a set. The lower die set 53 includes a hole punch die 54 paired with the hole punch 44, a total punch die 55 and a total punch 56 paired with the total punch and die 43, and a die. A knockout plate 57 for removing metal attached to the inner opening of the opening, and a knocking die 58 paired with a knocking bunch 45 are provided. 59 is a cradle for alignment on which finished parts cut from raw materials are stacked. When the lower mold 5 is viewed from direction B, it looks like Figure 3. Pressing is performed using such a press machine according to the following procedure.

As an example, we will explain the case of making a ring-shaped part as shown in Figure 6. FIG. 4 is an explanatory diagram of the processing procedure. In this figure, the shaded area is the punched out part. First, an unprocessed material 6 as shown in Fig. (a) is fed onto the lower mold 5. Here, a pilot hole 61 as shown in Figure (b) is punched using the hole punch 44 and the hole punch die 54. Next, using a punch for complete punching and dies 43, 55, and 56, an inwardly open circular part 62 is punched out as shown in FIG. Note the arc-shaped punched grooves 63 that are interrupted at certain points. As a result, the ring-shaped part is connected to the material at the bridge at Jfll. Formation of Section 63 is performed using a punch with cutting edges removed at four locations on the press surface. Here, the ring-shaped parts connected by the bridge are sent to the top of the alignment pedestal 59. Next, the ring-shaped parts connected by the bridge are punched using the dropping punch 45 and the dropping die 58, and the ring-shaped parts are cut from the material onto the alignment cradle 59. After being cut off, the material has a circular hole 64 with the same diameter as the punching bowl 63, as shown in Figure (d). Thereafter, the ring-shaped parts are cut off and stacked on the alignment pedestal 59 in the same manner. This manufacturing method is
For example, it is applied to the production of laminated steel plates that make up the rotor core and stator core of motors. Note that the bridge may be shaped at other locations than the four locations depending on the strength of the bridge. Effects> In the present invention, the required shape is pressed in one step, but the parts are kept connected by bridges so that they can be taken out of the mold, and the parts are sent outside the mold and pressed in the final process. The procedure involves cutting off the bridge part and cutting off the parts. This results in the following effects. ■The number of man-hours can be reduced because there is no need to take out cut-off parts. ■Work safety is improved because the cut parts are removed outside the mold. ■Since the cutting is done at the 1@J location, it is possible to stack parts in one direction.

[Brief explanation of drawings]

Fig. 1 is a diagram showing an example of a press machine used for carrying out the method according to the present invention, Figs. 2 and 3 are main part configuration diagrams of the press machine shown in Fig. Diagram for explaining the operation of the invention, No. 5
The figure shows an example of horizontal forming using a conventional press die, and Fig. 6 shows the shape of a part made by the press die shown in Fig. 5. 4... Upper die, 42... Upper die set, 43... Complete punch and die, 45... Dropping punch, 46... Slide, 5... Lower die, 53...
・Lower die set 1・, 55 ・Sounukifu die, 56
...Punch for total punching, 58...Die for dropping, 5...Receptacle for alignment. Section I Figure 4 (α冫(b) (C) (dのFigure 2 Figure 5 tr Figure M

Claims (1)

[Scope of Claims] A method for manufacturing parts using press working technology, the method comprising punching out a material with a press die to produce parts in a desired shape, the method comprising the following steps: (1) Using a punch with a part of the cutting edge on the press surface removed,
A process in which parts are pressed to a state where they are connected to the material with a bridge without being completely removed. (2) The process of transporting parts connected by bridges to the parts extraction position. (3) The process of cutting this bridge with a press and cutting the parts from the material.